Fluorescent articles having multiple film layers
First Claim
Patent Images
1. A retroreflective sheeting article comprising:
- an underlayer colored fluorescent film comprising at least one fluorescent dye within an underlayer polymer matrix;
an overlayer colored fluorescent film having at least one fluorescent dye within an overlayer polymer matrix, said overlayer colored fluorescent film has better fluorescent color stability than said underlayer colored film;
the article has retroreflective members, said overlayer colored fluorescent film being over said underlayer colored fluorescent film;
said at least one fluorescent dye in one said film is different from any fluorescent dye in the other said film, and said overlayer polymer matrix and said underlayer polymer matrix are different from each other, andsaid article has a selected fluorescent coloration different from both said underlayer colored fluorescent film and said overlayer colored fluorescent film.
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Accused Products
Abstract
Articles are provided which have fluorescent properties and which are suitable for use in making retroreflective articles such as safety and informational signage. The articles have at least two film layers, each film layer including a colorant dye. The multiple film layer sheeting exhibits excellent resistance to weathering and overall color durability while also providing chromaticity properties dictated by industry standards for a particular coloration. A method of preparing the articles is provided. In a particular application, the articles embody retroreflective properties and are fluorescent yellow signs.
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Citations
78 Claims
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1. A retroreflective sheeting article comprising:
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an underlayer colored fluorescent film comprising at least one fluorescent dye within an underlayer polymer matrix; an overlayer colored fluorescent film having at least one fluorescent dye within an overlayer polymer matrix, said overlayer colored fluorescent film has better fluorescent color stability than said underlayer colored film; the article has retroreflective members, said overlayer colored fluorescent film being over said underlayer colored fluorescent film; said at least one fluorescent dye in one said film is different from any fluorescent dye in the other said film, and said overlayer polymer matrix and said underlayer polymer matrix are different from each other, and said article has a selected fluorescent coloration different from both said underlayer colored fluorescent film and said overlayer colored fluorescent film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An article having fluorescent coloration, comprising:
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an underlayer colored fluorescent film having at least one fluorescent dye within an underlayer acrylic resin polymer matrix; an overlayer colored fluorescent film having at least one fluorescent dye within an overlayer polymer matrix, said overlayer polymer matrix having been formed from a polycarbonate or an acrylic resin; said overlayer colored fluorescent film overlies said underlayer colored fluorescent film and the article has retroreflective elements; and said at least one fluorescent dye in one said film is different from any fluorescent dye in the other said film, said overlayer colored fluorescent film and said underlayer colored fluorescent film being different from each other, and the article has a selected fluorescent coloration different from the coloration of either said underlayer colored fluorescent film or said overlayer colored fluorescent film. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A retroreflective article having fluorescent yellow coloration, comprising:
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an underlayer fluorescent orange film having at least one fluorescent perylene imide dye within an underlayer acrylic resin polymer matrix; an overlayer fluorescent yellow-green film having at least one fluorescent benzothiazine dye within an overlayer polymer matrix, said overlayer polymer matrix having been formed from a polycarbonate; a cap layer film of an acrylic resin; said overlayer fluorescent yellow-green film overlies said underlayer fluorescent orange film, and said cap layer overlies said overlayer; and said article has retroreflective elements and has a fluorescent yellow coloration which results from the combination of said fluorescent yellow-green overlayer over said fluorescent orange underlayer. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52)
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53. A retroreflective article having fluorescent coloration, comprising:
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an underlayer colored fluorescent film having at least one fluorescent dye within an underlayer acrylic resin polymer matrix; an overlayer colored fluorescent film having at least one fluorescent dye within an overlayer polymer matrix, said overlayer polymer matrix having been formed from a polycarbonate or an acrylic resin; a cap layer film of a polyarylate resin; said overlayer colored fluorescent film overlies said underlayer colored fluorescent film, and said cap layer overlies said overlayer; and said at least one fluorescent dye in one said film is different from any fluorescent dye in the other said film, the article has retroreflective members and has a selected fluorescent coloration different from the coloration of either said underlayer colored fluorescent film or said overlayer colored fluorescent film. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62)
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63. An article comprising:
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an underlayer colored fluorescent film comprising at least one first fluorescent dye within an underlayer polymer matrix; an overlayer colored fluorescent film comprising at least one second fluorescent dye within an overlayer polymer matrix; a cap layer polymeric film comprising a polymeric resin, said polymeric resin comprising at least one polymer, or a mixture thereof, selected from the group consisting of; (i) polymers having a polymeric backbone comprising the following repeating moiety A; (i) polymers having a polymeric backbone comprising the following repeating moiety A; - View Dependent Claims (64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77)
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78. A retroreflective sheeting article comprising:
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an underlayer colored fluorescent film comprising at least one perylene imide fluorescent dye within an acrylic resin underlayer polymer matrix; an overlayer colored fluorescent film having at least one benzoxanthene fluorescent dye within an acrylic resin overlayer polymer matrix, said overlayer colored fluorescent film has better fluorescent color stability than said underlayer colored film; the article has retroreflective members, said overlayer colored fluorescent film being over said underlayer colored fluorescent film; said at least one fluorescent dye in one said film is different from any fluorescent dye in the other said film, and said article has a selected fluorescent coloration different from both said underlayer colored fluorescent film and said overlayer colored fluorescent film.
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Specification